Method of balancing bobbins and the like



May 3,1927. 1,6 7,518

J. LOCK METHOD OF BALANCING BOBBINS AND THE LIKE Filed Abril 16. 1926 ciao/f Lac/f ii 5 I 6H0: mm

Patented May 3, 1927.

UNITED STATES JACK LOCK, 0F LOWELLyMASSACHUSETTS.

. METHOD or BALANCING BOBBINS AND THE LIKE.

Application filed April 16, 1926. Serial No. 102,512.

This invention relates to a method of balancing bobbins or the like and includes the balancing of spools, twistcrs and other cord or yarn carrying implements and has for an object to apply at or about the axis of rotation of said device a member heavier upon one diametrical side of the axis than the other to compensate for imperfections and irregularities in the construction and material of the device.

It is well known that bobbins, spools, .twisters and other similar devices used in the textile trades are used and rotated at a very high rate of speed and that, unless accurately balanced, such devices are inoperative.

It has also been found that no matter how carefully the device may be turned or bored and with what precision it is otherwise constructed, differences in the density of the material or other causes produces unbalanced bobbins and the like which are worthless and are discarded at a considerable expense to the manufacturer.

The present invention is for the purpose of salvaging such otherwise useless and inoperative bobbins and the like by accurately balancing the unbalanced member for satisfactory operation.

A further object of the invention is, therefore, to apply to such spools, bobbins, twisters, or the like, some member corresponding lo a sleeve or a plug which is in itself unbalanced relative to its own axis andapplying the heavier side of said plug, sleeve or the like to the lighter side of the axis of the bobbin whereby the differences existing are compensated for.

The use of the term bobbin as herein is intended in cover all of the articles hereinbefore referred to as well as all other types of warp, yarn, cord or thread-carrying members and to be no limitation upon the invention.

In the drawings,

At Figure 1' is one type of device shown in elevation,apart being broken away to show the compensating member.

Figure 2 is a top plan view of the device shown at Figure 1.

Figure 3 is a View in side elevation with parts broken away of another type of device showing in section the compensating member.

Figures 4, 5, 6 and 7 are respectively perspectlve views of different embodiments of the compensating member removed from operative position.

Like characters of reference indicate corresponding parts throughout the several views.

Bobbins within the meaning of the term as above defined are provided with longitudinal or axial bores 10 adapting the device to operate upon a spindle, either fixed or rotating. So far as other physical features of he bobbin is concerned, the devices as shown in the drawings at Figures 1 and 3 are merely illustrative well known types and are no limifation upon the use of the device in the very large number of other types also known to the art.

The bobbin after being completed is first tested as to its accuracy of balance. If found to be balanced properly, no use of the present invention is necessary, but upon those bobbins found to be unbalanced, the present invention is employed; Assuming that the bobbins shown at Figures 1 and 3 are those unbalanced, the balancing has been perfected by the introduction of compensating members. At Figure 1 a split sleeve 11 has been driven or otherwise forced into the axial bore of the bobbin and, by reason'of the fact that it is split upon one side, that side is lighter than the diametrically opposite position and is, therefore, applied to the bob-bin correspondng to the heavier side of the bobbin as disclosed in the balancing test..

At Figure 3 the compensating member is in the form of a composite plug composed of preferably two materials 12 and 13, as for instance wood and metal, and either of said materials may be employed at the positions 12 or 13. At one side of the composite plug a furrowor depression 14: is broached or otherwise milled out. As shown at Figures 3 and 5, this depression is in the form of an arcuate out but it is to be understood that the invention is not limited to such formation of the weight reducing depression and that any depression formed in the side of the plug is covered by the invention.

At Figure 7 the plug 15 is shown of homogeneous material with a depression 16 in accordance with the description previously applied to the plug 12. This plug 15 may likewise be of any material, metal, wood or the like.

At Figure 4 a plug 17 is disclosed having an eccentric bore 18 whereby one side of the axis of the plug as defined by the external wall is lighter than the opposite side. All of these plugs, sleeves or compensating members are applied in like manner to the bobbin or the like, the lighter side of the compensating member coinciding with the heavier side of the bobbin. The showing of sleeves, plugs,

bushings or other devices as specifically illustrated is not intended as any limitation upon the invention and any type of device which may be inserted into or in relation with the bobbin ha ing one side lighter than the other and applied to the bobbin with the lighter side of the compensating member coinciding with the heavier side of the bobbin is Within the scope of the present invention, as the present invention is the method of accurateh balancing the bobbins by applyingthereto a compensating member after the construction and balancing test has been completed.

lVhat I claim to be new is:

1. The method of balancing a bobbin or the like, consisting in applying rigidly to or about the axis of the bobbin a member axially coinciding With the bobbin but being heavier upon one side of its axis than the other, the lighter side of said compensating member coinciding with the heavier side of the bobbin.

2. The method of balancing bobbins or the like, consisting in introducing into a bore coinciding with the axis of the bobbin, a member axially coinciding with the bobbin but in itself permanently heavier upon one side of its axis than the other, saidheavier side coinciding with the lighter side of the bobbin before said compensating member is introduce d.

3. The method of balancing bobbins and the like, consisting in testing said bobbins for accuracy ot balance and noting in some manner the lighter and heavier dian'ietrical sides of said bobbin and applying to the axis of said bobbin a member axially coinciding vith the bobbin, said member being permanently heavier upon one side of its axis than the other. the heavier side of said compensating member coinciding with one side of the bobbin noted as lighter than its diametrical opposite side.

In testimony whereof I aflix my signature.

JACK LOCK. 

